condition mean min max ZT0-3 1259.498053 1259.498053 1259.498053 ZT4-7 1900.350122 1900.350122 1900.350122 ZT8-11 1617.06853 1617.06853 1617.06853 ZT12-15 1338.0143859999998 1338.0143859999998 1338.0143859999998 ZT16-19 1224.740942 1224.740942 1224.740942 ZT20-23 1076.29702 1076.29702 1076.29702